The rocker filed for divorce in January, stating the marriage was “irretrievably broken,” shortly before being spotted out on the town with actress and close family friend Meg Ryan.

Irwin, 41, quickly became linked to a number of men, among them Russell Simmons, before settling on 32-year-old media mogul Jay Penske. Penske is the founder of PMC, a digital media company that owns and operates Nikki Finke’s Deadline.com among other sites, and the son of racing driver Roger Penske.

This is the third divorce for Mellencamp, 59, and first for Irwin.

Irwin is currently the face of Almay while Mellencamp is working on the musical “Ghost Brothers of Darkland County” with horror novelist Stephen King, set to debut in 2012 at the Alliance Theatre in Atlanta.

Both Mellencamp and Irwin, who lived on a 56-acre estate in Lanke Monroe, Ind., will continue to reside primarily in Indiana.